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IM_FX_CurvatureMargin

Description	Margin aggregation from FX curvature sensitivities
Notation	$CurvatureMargin_{RiskClass}$
Formula	$CurvatureMargin =max\left ( \sum_{b,k} CVR_{b,k} + \lambda \cdot \sqrt{\sum_{b}K_{b}^{2} + \sum_{b}{\sum_{c \neq b} \gamma_{b,c}^2 \cdot S_{b} \cdot S_{c}}} ,0 \right )$